ИСТИНА

Hachuring is a classic method of cartographic relief presentation. Today hachures are still popular in presentation of anthropogenic relief on archeological and topographic maps. Some elements of hachuring can be found in geomorphological and hydrometeorological mapping, where flowlines and arrows are used to show the intensity and direction of the flow on the sur-face, or its aspect and slope. Several methods have been introduced for topographic hachures au-tomation, but none of them fully satisfy traditional requirements for hachure construction. The study aims to reveal the potential of hachuring in further development as surface presen-tation method. Automated implementation of original requirements for hachure construction is provided by new algorithm using vector flowlines. Then an advanced hachuring technique called 'slope and aspect hachuring' is presented which allows depicting slope, aspect and flow direction of the surface simultaneously. Slope and aspect hachuring is compared to traditional area colors, which alows to reveal its advantages and shortcomings. We also demonstrate an influence of contour interval and hachuring step on image legibility and give some recommendations for se-lection of these parameters.